| /* |
| * ==================================================================== |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| package org.apache.hc.client5.http.impl.async; |
| |
| import java.io.IOException; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.util.Iterator; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| import org.apache.hc.client5.http.HttpRoute; |
| import org.apache.hc.client5.http.StandardMethods; |
| import org.apache.hc.client5.http.async.AsyncExecCallback; |
| import org.apache.hc.client5.http.async.AsyncExecChain; |
| import org.apache.hc.client5.http.async.AsyncExecChainHandler; |
| import org.apache.hc.client5.http.async.AsyncExecRuntime; |
| import org.apache.hc.client5.http.auth.AuthExchange; |
| import org.apache.hc.client5.http.auth.ChallengeType; |
| import org.apache.hc.client5.http.auth.CredentialsProvider; |
| import org.apache.hc.client5.http.auth.CredentialsStore; |
| import org.apache.hc.client5.http.impl.AuthSupport; |
| import org.apache.hc.client5.http.config.RequestConfig; |
| import org.apache.hc.client5.http.impl.auth.HttpAuthenticator; |
| import org.apache.hc.client5.http.protocol.AuthenticationStrategy; |
| import org.apache.hc.client5.http.protocol.HttpClientContext; |
| import org.apache.hc.client5.http.utils.URIUtils; |
| import org.apache.hc.core5.annotation.Contract; |
| import org.apache.hc.core5.annotation.ThreadingBehavior; |
| import org.apache.hc.core5.http.EntityDetails; |
| import org.apache.hc.core5.http.Header; |
| import org.apache.hc.core5.http.HttpException; |
| import org.apache.hc.core5.http.HttpHeaders; |
| import org.apache.hc.core5.http.HttpHost; |
| import org.apache.hc.core5.http.HttpRequest; |
| import org.apache.hc.core5.http.HttpResponse; |
| import org.apache.hc.core5.http.ProtocolException; |
| import org.apache.hc.core5.http.nio.AsyncDataConsumer; |
| import org.apache.hc.core5.http.nio.AsyncEntityProducer; |
| import org.apache.hc.core5.http.protocol.HttpCoreContext; |
| import org.apache.hc.core5.http.protocol.HttpProcessor; |
| import org.apache.hc.core5.net.URIAuthority; |
| import org.apache.hc.core5.util.Args; |
| import org.apache.logging.log4j.LogManager; |
| import org.apache.logging.log4j.Logger; |
| |
| /** |
| * Request executor in the request execution chain that is responsible |
| * for implementation of HTTP specification requirements. |
| * <p> |
| * Further responsibilities such as communication with the opposite |
| * endpoint is delegated to the next executor in the request execution |
| * chain. |
| * |
| * @since 5.0 |
| */ |
| @Contract(threading = ThreadingBehavior.IMMUTABLE) |
| class AsyncProtocolExec implements AsyncExecChainHandler { |
| |
| private final Logger log = LogManager.getLogger(getClass()); |
| |
| private final HttpProcessor httpProcessor; |
| private final AuthenticationStrategy targetAuthStrategy; |
| private final AuthenticationStrategy proxyAuthStrategy; |
| private final HttpAuthenticator authenticator; |
| |
| AsyncProtocolExec( |
| final HttpProcessor httpProcessor, |
| final AuthenticationStrategy targetAuthStrategy, |
| final AuthenticationStrategy proxyAuthStrategy) { |
| this.httpProcessor = Args.notNull(httpProcessor, "HTTP protocol processor"); |
| this.targetAuthStrategy = Args.notNull(targetAuthStrategy, "Target authentication strategy"); |
| this.proxyAuthStrategy = Args.notNull(proxyAuthStrategy, "Proxy authentication strategy"); |
| this.authenticator = new HttpAuthenticator(); |
| } |
| |
| @Override |
| public void execute( |
| final HttpRequest request, |
| final AsyncEntityProducer entityProducer, |
| final AsyncExecChain.Scope scope, |
| final AsyncExecChain chain, |
| final AsyncExecCallback asyncExecCallback) throws HttpException, IOException { |
| final HttpRoute route = scope.route; |
| final HttpClientContext clientContext = scope.clientContext; |
| |
| if (route.getProxyHost() != null && !route.isTunnelled()) { |
| try { |
| URI uri = request.getUri(); |
| if (!uri.isAbsolute()) { |
| uri = URIUtils.rewriteURI(uri, route.getTargetHost(), true); |
| } else { |
| uri = URIUtils.rewriteURI(uri); |
| } |
| request.setPath(uri.toASCIIString()); |
| } catch (final URISyntaxException ex) { |
| throw new ProtocolException("Invalid request URI: " + request.getRequestUri(), ex); |
| } |
| } |
| |
| final URIAuthority authority = request.getAuthority(); |
| if (authority != null) { |
| final CredentialsProvider credsProvider = clientContext.getCredentialsProvider(); |
| if (credsProvider instanceof CredentialsStore) { |
| AuthSupport.extractFromAuthority(authority, (CredentialsStore) credsProvider); |
| } |
| } |
| |
| final AtomicBoolean challenged = new AtomicBoolean(false); |
| internalExecute(challenged, request, entityProducer, scope, chain, asyncExecCallback); |
| } |
| |
| private void internalExecute( |
| final AtomicBoolean challenged, |
| final HttpRequest request, |
| final AsyncEntityProducer entityProducer, |
| final AsyncExecChain.Scope scope, |
| final AsyncExecChain chain, |
| final AsyncExecCallback asyncExecCallback) throws HttpException, IOException { |
| final HttpRoute route = scope.route; |
| final HttpClientContext clientContext = scope.clientContext; |
| final AsyncExecRuntime execRuntime = scope.execRuntime; |
| |
| final HttpHost target = route.getTargetHost(); |
| final HttpHost proxy = route.getProxyHost(); |
| |
| final AuthExchange targetAuthExchange = clientContext.getAuthExchange(target); |
| final AuthExchange proxyAuthExchange = proxy != null ? clientContext.getAuthExchange(proxy) : new AuthExchange(); |
| |
| clientContext.setAttribute(HttpClientContext.HTTP_ROUTE, route); |
| clientContext.setAttribute(HttpCoreContext.HTTP_REQUEST, request); |
| httpProcessor.process(request, entityProducer, clientContext); |
| |
| if (!request.containsHeader(HttpHeaders.AUTHORIZATION)) { |
| if (log.isDebugEnabled()) { |
| log.debug("Target auth state: " + targetAuthExchange.getState()); |
| } |
| authenticator.addAuthResponse(target, ChallengeType.TARGET, request, targetAuthExchange, clientContext); |
| } |
| if (!request.containsHeader(HttpHeaders.PROXY_AUTHORIZATION) && !route.isTunnelled()) { |
| if (log.isDebugEnabled()) { |
| log.debug("Proxy auth state: " + proxyAuthExchange.getState()); |
| } |
| authenticator.addAuthResponse(proxy, ChallengeType.PROXY, request, proxyAuthExchange, clientContext); |
| } |
| |
| chain.proceed(request, entityProducer, scope, new AsyncExecCallback() { |
| |
| @Override |
| public AsyncDataConsumer handleResponse( |
| final HttpResponse response, final EntityDetails entityDetails) throws HttpException, IOException { |
| |
| clientContext.setAttribute(HttpCoreContext.HTTP_RESPONSE, response); |
| httpProcessor.process(response, entityDetails, clientContext); |
| |
| if (request.getMethod().equalsIgnoreCase(StandardMethods.TRACE.name())) { |
| // Do not perform authentication for TRACE request |
| return asyncExecCallback.handleResponse(response, entityDetails); |
| } |
| if (needAuthentication(targetAuthExchange, proxyAuthExchange, route, request, response, clientContext)) { |
| challenged.set(true); |
| return null; |
| } else { |
| challenged.set(false); |
| return asyncExecCallback.handleResponse(response, entityDetails); |
| } |
| } |
| |
| @Override |
| public void completed() { |
| if (!execRuntime.isConnected()) { |
| if (proxyAuthExchange.getState() == AuthExchange.State.SUCCESS |
| && proxyAuthExchange.getAuthScheme() != null |
| && proxyAuthExchange.getAuthScheme().isConnectionBased()) { |
| log.debug("Resetting proxy auth state"); |
| proxyAuthExchange.reset(); |
| } |
| if (targetAuthExchange.getState() == AuthExchange.State.SUCCESS |
| && targetAuthExchange.getAuthScheme() != null |
| && targetAuthExchange.getAuthScheme().isConnectionBased()) { |
| log.debug("Resetting target auth state"); |
| targetAuthExchange.reset(); |
| } |
| } |
| |
| if (challenged.get()) { |
| // Reset request headers |
| final HttpRequest original = scope.originalRequest; |
| request.setHeaders(); |
| for (final Iterator<Header> it = original.headerIterator(); it.hasNext(); ) { |
| request.addHeader(it.next()); |
| } |
| try { |
| internalExecute(challenged, request, entityProducer, scope, chain, asyncExecCallback); |
| } catch (final HttpException | IOException ex) { |
| asyncExecCallback.failed(ex); |
| } |
| } else { |
| asyncExecCallback.completed(); |
| } |
| } |
| |
| @Override |
| public void failed(final Exception cause) { |
| asyncExecCallback.failed(cause); |
| } |
| |
| }); |
| } |
| |
| private boolean needAuthentication( |
| final AuthExchange targetAuthExchange, |
| final AuthExchange proxyAuthExchange, |
| final HttpRoute route, |
| final HttpRequest request, |
| final HttpResponse response, |
| final HttpClientContext context) { |
| final RequestConfig config = context.getRequestConfig(); |
| if (config.isAuthenticationEnabled()) { |
| final HttpHost target = AuthSupport.resolveAuthTarget(request, route); |
| final boolean targetAuthRequested = authenticator.isChallenged( |
| target, ChallengeType.TARGET, response, targetAuthExchange, context); |
| |
| HttpHost proxy = route.getProxyHost(); |
| // if proxy is not set use target host instead |
| if (proxy == null) { |
| proxy = route.getTargetHost(); |
| } |
| final boolean proxyAuthRequested = authenticator.isChallenged( |
| proxy, ChallengeType.PROXY, response, proxyAuthExchange, context); |
| |
| if (targetAuthRequested) { |
| return authenticator.prepareAuthResponse(target, ChallengeType.TARGET, response, |
| targetAuthStrategy, targetAuthExchange, context); |
| } |
| if (proxyAuthRequested) { |
| return authenticator.prepareAuthResponse(proxy, ChallengeType.PROXY, response, |
| proxyAuthStrategy, proxyAuthExchange, context); |
| } |
| } |
| return false; |
| } |
| |
| } |
